{"id":"https://openalex.org/W1974294972","doi":"https://doi.org/10.1109/tcomm.2014.2326881","title":"A New Beamforming Design for MIMO AF Relaying Systems With Direct Link","display_name":"A New Beamforming Design for MIMO AF Relaying Systems With Direct Link","publication_year":2014,"publication_date":"2014-05-30","ids":{"openalex":"https://openalex.org/W1974294972","doi":"https://doi.org/10.1109/tcomm.2014.2326881","mag":"1974294972"},"language":"en","primary_location":{"id":"doi:10.1109/tcomm.2014.2326881","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2014.2326881","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Communications","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5005926359","display_name":"Han-Bae Kong","orcid":"https://orcid.org/0000-0003-2856-7060"},"institutions":[{"id":"https://openalex.org/I197347611","display_name":"Korea University","ror":"https://ror.org/047dqcg40","country_code":"KR","type":"education","lineage":["https://openalex.org/I197347611"]}],"countries":["KR"],"is_corresponding":true,"raw_author_name":"Han-Bae Kong","raw_affiliation_strings":["School of Electrical Engineering, Korea University, Seoul, Korea","Sch. of Electr. Eng., Korea Univ., Seoul, South Korea#TAB#"],"affiliations":[{"raw_affiliation_string":"School of Electrical Engineering, Korea University, Seoul, Korea","institution_ids":["https://openalex.org/I197347611"]},{"raw_affiliation_string":"Sch. of Electr. Eng., Korea Univ., Seoul, South Korea#TAB#","institution_ids":["https://openalex.org/I197347611"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5083703040","display_name":"Changick Song","orcid":"https://orcid.org/0000-0002-5325-3699"},"institutions":[{"id":"https://openalex.org/I47508984","display_name":"Imperial College London","ror":"https://ror.org/041kmwe10","country_code":"GB","type":"education","lineage":["https://openalex.org/I47508984"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Changick Song","raw_affiliation_strings":["Department of Electrical Engineering, Imperial College London, London, U.K","Dept. of Electr. Eng., Imperial Coll. London, London, , UK"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Imperial College London, London, U.K","institution_ids":["https://openalex.org/I47508984"]},{"raw_affiliation_string":"Dept. of Electr. Eng., Imperial Coll. London, London, , UK","institution_ids":["https://openalex.org/I47508984"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008913759","display_name":"Haewook Park","orcid":"https://orcid.org/0000-0003-1155-0107"},"institutions":[{"id":"https://openalex.org/I197347611","display_name":"Korea University","ror":"https://ror.org/047dqcg40","country_code":"KR","type":"education","lineage":["https://openalex.org/I197347611"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Haewook Park","raw_affiliation_strings":["School of Electrical Engineering, Korea University, Seoul, Korea","Sch. of Electr. Eng., Korea Univ., Seoul, South Korea#TAB#"],"affiliations":[{"raw_affiliation_string":"School of Electrical Engineering, Korea University, Seoul, Korea","institution_ids":["https://openalex.org/I197347611"]},{"raw_affiliation_string":"Sch. of Electr. Eng., Korea Univ., Seoul, South Korea#TAB#","institution_ids":["https://openalex.org/I197347611"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100697614","display_name":"Inkyu Lee","orcid":"https://orcid.org/0000-0003-3701-4433"},"institutions":[{"id":"https://openalex.org/I197347611","display_name":"Korea University","ror":"https://ror.org/047dqcg40","country_code":"KR","type":"education","lineage":["https://openalex.org/I197347611"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Inkyu Lee","raw_affiliation_strings":["School of Electrical Engineering, Korea University, Seoul, Korea","Sch. of Electr. Eng., Korea Univ., Seoul, South Korea#TAB#"],"affiliations":[{"raw_affiliation_string":"School of Electrical Engineering, Korea University, Seoul, Korea","institution_ids":["https://openalex.org/I197347611"]},{"raw_affiliation_string":"Sch. of Electr. Eng., Korea Univ., Seoul, South Korea#TAB#","institution_ids":["https://openalex.org/I197347611"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5005926359"],"corresponding_institution_ids":["https://openalex.org/I197347611"],"apc_list":null,"apc_paid":null,"fwci":5.517,"has_fulltext":false,"cited_by_count":28,"citation_normalized_percentile":{"value":0.95993058,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"62","issue":"7","first_page":"2286","last_page":"2295"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10796","display_name":"Cooperative Communication and Network Coding","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10796","display_name":"Cooperative Communication and Network Coding","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12791","display_name":"Full-Duplex Wireless Communications","score":0.9991000294685364,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9977999925613403,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/beamforming","display_name":"Beamforming","score":0.7025878429412842},{"id":"https://openalex.org/keywords/relay","display_name":"Relay","score":0.680274248123169},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.621170699596405},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5567131042480469},{"id":"https://openalex.org/keywords/signal-to-noise-ratio","display_name":"Signal-to-noise ratio (imaging)","score":0.5466185808181763},{"id":"https://openalex.org/keywords/upper-and-lower-bounds","display_name":"Upper and lower bounds","score":0.4877184331417084},{"id":"https://openalex.org/keywords/diversity-gain","display_name":"Diversity gain","score":0.46545034646987915},{"id":"https://openalex.org/keywords/control-theory","display_name":"Control theory (sociology)","score":0.4633380174636841},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.42891770601272583},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.42654529213905334},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.29899805784225464},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.1860579550266266},{"id":"https://openalex.org/keywords/power","display_name":"Power (physics)","score":0.11043944954872131}],"concepts":[{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.7025878429412842},{"id":"https://openalex.org/C2778156585","wikidata":"https://www.wikidata.org/wiki/Q174053","display_name":"Relay","level":3,"score":0.680274248123169},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.621170699596405},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5567131042480469},{"id":"https://openalex.org/C13944312","wikidata":"https://www.wikidata.org/wiki/Q7512748","display_name":"Signal-to-noise ratio (imaging)","level":2,"score":0.5466185808181763},{"id":"https://openalex.org/C77553402","wikidata":"https://www.wikidata.org/wiki/Q13222579","display_name":"Upper and lower bounds","level":2,"score":0.4877184331417084},{"id":"https://openalex.org/C164785522","wikidata":"https://www.wikidata.org/wiki/Q5283966","display_name":"Diversity gain","level":4,"score":0.46545034646987915},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.4633380174636841},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.42891770601272583},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.42654529213905334},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.29899805784225464},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.1860579550266266},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.11043944954872131},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.0},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tcomm.2014.2326881","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2014.2326881","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Communications","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320322120","display_name":"National Research Foundation of Korea","ror":"https://ror.org/013aysd81"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":30,"referenced_works":["https://openalex.org/W1966914788","https://openalex.org/W1973823697","https://openalex.org/W2015757254","https://openalex.org/W2024607354","https://openalex.org/W2032301474","https://openalex.org/W2048874524","https://openalex.org/W2098567664","https://openalex.org/W2098969228","https://openalex.org/W2105147296","https://openalex.org/W2105950650","https://openalex.org/W2106829923","https://openalex.org/W2108246534","https://openalex.org/W2112507157","https://openalex.org/W2113026489","https://openalex.org/W2128695949","https://openalex.org/W2130509920","https://openalex.org/W2130667916","https://openalex.org/W2149912746","https://openalex.org/W2151953578","https://openalex.org/W2152121970","https://openalex.org/W2157645420","https://openalex.org/W2159388329","https://openalex.org/W2160185418","https://openalex.org/W2162789906","https://openalex.org/W2165350939","https://openalex.org/W2167447263","https://openalex.org/W2167895918","https://openalex.org/W4249896531","https://openalex.org/W6675980476","https://openalex.org/W6683883945"],"related_works":["https://openalex.org/W2724724053","https://openalex.org/W2081779132","https://openalex.org/W2132176174","https://openalex.org/W804581915","https://openalex.org/W2041603281","https://openalex.org/W1972092935","https://openalex.org/W2098218324","https://openalex.org/W2028879858","https://openalex.org/W2032682113","https://openalex.org/W2123600176"],"abstract_inverted_index":{"In":[0,107],"this":[1,57],"paper,":[2],"we":[3,109],"propose":[4],"a":[5,41,47,61,88,111,125],"new":[6,62,89],"beamforming":[7,90],"technique":[8,144],"that":[9,121,141],"maximizes":[10],"the":[11,28,65,69,80,97,102,116,142,150,164],"end-to-end":[12,66],"signal-to-noise":[13],"ratio":[14],"(SNR)":[15],"for":[16,51,68],"amplify-and-forward":[17],"multiple-input-multiple-output":[18],"cooperative":[19,70],"relaying":[20,71,130],"systems":[21,72,131],"with":[22,132,154],"direct":[23,133],"link":[24],"between":[25],"thesource":[26],"and":[27,73,119,158],"destination.":[29],"Instead":[30],"of":[31,64,83,96,115,129],"conventional":[32],"schemes":[33],"resorting":[34],"to":[35,149],"an":[36],"iterative":[37],"method,":[38],"such":[39],"as":[40,79],"gradient":[42,151],"ascentalgorithm,":[43],"our":[44,122,159],"scheme":[45,118,123],"provides":[46],"simple":[48],"closed-form":[49],"solution":[50],"source-relay":[52],"joint":[53],"beamformer":[54],"designs.":[55],"To":[56],"end,":[58],"wefirst":[59],"derive":[60],"expression":[63],"SNR":[67],"its":[74],"lower":[75],"bound,":[76],"which":[77,92],"isgiven":[78],"harmonic":[81],"mean":[82],"two":[84,98],"individual":[85],"SNRs.":[86],"Then,":[87],"scheme,":[91],"adaptively":[93],"optimizes":[94],"one":[95],"SNRs":[99],"depending":[100],"on":[101],"channel":[103],"condition,":[104],"is":[105,136],"proposed.":[106],"addition,":[108],"perform":[110],"diversity":[112,127],"order":[113,128],"analysis":[114],"proposed":[117,143],"show":[120],"achieves":[124],"full":[126],"link.":[134],"It":[135],"confirmed":[137],"by":[138],"simulation":[139],"results":[140],"obtains":[145],"almost":[146],"identical":[147],"performance":[148],"ascent":[152],"algorithm":[153],"much":[155],"reduced":[156],"complexity,":[157],"analytical":[160],"work":[161],"accurately":[162],"predicts":[163],"numerical":[165],"results.":[166]},"counts_by_year":[{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":7},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":4},{"year":2014,"cited_by_count":4}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}